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So I'm making a pixel art game with a 3d world. I would like to have the interface be the same resolution as the rest of the game, but I'm having some trouble.

I'm rendering the game with a perspective camera that outputs to a render texture. The render texture is on a quad being drawn by an orthographic camera, and this is what the player sees on the screen.

My Canvas right now is Screen Space - Overlay, which I haven't found any way to render to the render texture, so my attempt at a solution was to render the Canvas to its own orthographic camera using Screen Space - Camera, and have that camera output to the render texture. This obviously works at giving me the effect I'm looking for,